aggcat.spad line 418 [edit on github]
This category is a collection of operations common to both categories Dictionary and MultiDictionary
dictionary()$D creates an empty dictionary of type D.
dictionary([x, y, ..., z]) creates a dictionary consisting of entries x, y, ..., z.
remove!(x, d) destructively changes dictionary d by removing all entries y such that y = x.
remove!(p, d) destructively changes dictionary d by removing all entries x such that p(x) is true.
select!(p, d) destructively changes dictionary d by removing all entries x such that p(x) is not true.
BagAggregate(S)
Collection(S)
InnerEvalable(S, S)
Evalable(S)